.. and ... are more than I ever thought.
perl -pe '11..exit'
That appears to be the same as head -10, though I'm not sure why you
wouldn't do:
perl -pe '$. > 10 && exit'
Cos that's just more readable.
And this is something quite fun.
perl -e 'while (1) { ++$i == 10 ... --$i == 0; print "$i\n";}'
Steve